Crusher and pulverizer.



No. 658,288. Patented Sept. I8, 1900.

T. SHAW & .1. 0. LEE.

CRUSHER AND PULV-ERILEB.

(Application filed Feb, 9, 1900.) Modem 2 Sheets-Sheet 1.

/ II L [)VVENTORS f B H 4 Amm s T. SHAW &. J. C. LEE.

CRUSHER AND PULVERIZER,

(Application filed Feb. 9, 1900.) Modem 2 Sheets$heet 2.

No. 658,288. Patented Sept. l8, I900.

J; X/V-VE/VTORS WITNESSES:

63 1 gamma:

UNITED STATES PAT T, OFFIcH.

THAXTER SHAW AND JOHN '0. LEE, on MEDFORD, WISCONSIN.

CRUSHER AND PULVERIZER.

SPECIFICATION forming part of Letters Patent No. 658,288, datedSeptember 18, 1900. Application filed February 9,1900. Serial No. 4,672.(No model.)

To all whom it may concern: I

Be it known that we, THAXTER SHAW and JOHN 0. LEE, citizens of theUnited States, residing at Medford,'in the county of Taylor and State ofWisconsin, have invented certain new and useful Improvements in Crushersand Pulverizers; and we do'hereby declare the following to bea full,clear, and exact de scription of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

- Our invention relates to improvements in machines for crushing orpulverizing all kinds of animal, vegetable, and mineral substances; andit has for its object to provide particularly an improved frame or ca'geagainst which the heaters act in crushing or pulverizing operation ofthe machine.

Our invention consists in the novel features hereinafter described andclaimed, and will be understood by reference to the accom panyingdrawings, wherein the same parts are indicated by the same lettersthroughout the several views.

Figure 1 represents a vertical sectional View of a crushing orpulverizing machine provided with our invention. .Fig. 2 represents adetail perspective view of the cage which constitutes our invention.Fig. 3 is a detail elevation as seen from the inner side of one of thesegmental side members of the cage. Fig. 4 is a sectional View,enlarged, taken on the line 44 in Fig. 3 and looking in the direction ofthe arrow. Fig. 5 is a perspective view of one of the cross-heads shownin Fig. 2, which connect the ends of the curved side beams. Fig. 6 is aperspective view, enlarged, of one of the knives which are held betweenthe curved beams shown in Fig. 2; and Fig. 7 is as shown in Fig. 1. Ourinvention consists,

however, in the construction of the cage or frametl. This cage or frame,which is shown complete inFig. 2, consists of two side beams orbars O inthe form of segments of a circle of the appropriate radius. These sidebeams or bars 0 are constructed oppositely, each with a segmental slot Crunning almost the entire length of the bar, the said slot being closedat one end 0 and opening upon the concave edge of the bar at the extremeopposite end thereof, as seen at 0 in Fig. 4. Near the extreme ends ofthe said segmental bars (J are formed openings 0 for the reception ofstuds or projections c on the ends of the cross-bars Thcreare two ofthese crossbars 0 as shown in Fig. 2, and they are permanently securedat their ends to the curved bars 0 by having the ends of theprojectionst, c riveted in the openings 0 thus forming a The cross-bars(J are each prorigid frame.

vided with a central enlargement or lug O provided with a perforation cfor the passage of a truss-rod O (seen in Fig. 2,) the said truss-rodbeing removable and adjustable by means of a nut engaging ascrew-threaded end thereof, as seen at 0 The knives or cutting-bars D(most clearly seen in Figs. 6 and 7) are separately formed and .eachsimilar to all the others. Thus each knife or cutting bar Dis providedwith a plane rear face d, upon which is centrally formed a transverserib or enlargement d, said rib or enlargement having-atransverse grooved therein. The front face of each knife D is formed with a curved orS1l'i1illY-CODC3.V6d contour d which is deepest at or near the base edged of the knife or bar. the knife or bar is an upward inclination orbevel from the rear side cl to the forward side d as seen most clearlyin Fig. 7, the effect being when the knives or bars are fitted togethera serrated appearance in cross-section to the assembled group of knives.Upon the forward or concave face of the bar D is formed centrally atransverse rib d having a central transverse rib or boss d thereon, soarranged and of such size as to fit the groove d in the rib d upon therear side of the adjacent knife when the knives are assembled Upon theupper or cutting edge d? of as seen in Fig. 7. Each bar or knife D has asquared boss or enlargement T) upon each end arranged to fit within thegrooves (3 upon the inner sides of the curved bars C the said knivesbeing placed in position in the said grooves one at a time by havingtheir ends D passed in the grooves C through the passages 0 at one endof the said slots. Then assembled, the vertical sides of the bosses Dabut against one another, their.

thickness corresponding to the distance between the opposite faces ofthe ribs d and (1 upon the front and rear faces of the knives or bars D.The spaces between the front and rear edges of the assembled knivesallow the disintegrated material to pass through and fall beneath thecage. Each knife-bar is provided with a central groove 01 in its baseedge, said groove running transversely of the bar extending through thecentral enlargemems at the center of the bar, as seen in Figs. 6 and 7,and in these grooves 01 which when the knives or bars are assembledconstit nte a continuous groove, the truss-rod C engages, and thus formsa central support for the knives, as seen in Figs. 1 and 2. Ashereinbefore described, the truss-rod C may be adjusted to bind the barsin position or to release the same by means of a nut 0 upon one or eachend of the said truss-rod. When the truss-rod has been drawn ta'ltbeneath the knives, the latter Will be held securely and rigidly inposition in the slots 0 of the curved bars and should any one or more ofthese knives become loose they may be readily tightened by screwing upthe nut a on one or both ends of the truss-rod C By reason of the bevelcutting edge CV of the knives or bars they may be readily sharpened uponan emery-wheel or other suitable sharpening device when they becomeworn, and, further, should one of such knives break or become injured tosuch an extent as to become useless it may be easily replaced.

The form of cage herein describedis adaptable to all machinesforcrushing and pulverizing now in use, particularly of the type.

knives which constitute a portion of our invention are particularly welladapted for grinding or pulverizing barks and other fibrous vegetablematerials.

The particular ad vantages of our invention reside in its simplicity andconsequent cheapness coupled with the advantages arising from thepeculiar construction thereof. These will be apparent to any practicalmind and need not be further referred to herein.

Having thus described our invention, what we claim, and desire to secnre by Letters Patent of the United States. is-

1. In a crushing and pulverizing machine, a stationary cage or framearranged to be operated against by the heaters, said frame comprising apair of curved members provided upon their inner opposite faces withlongitndinal grooves, and cross-heads rigidly connecting theircorresponding ends, a plurality of sectional knife'bars engaging attheir ends in said slots, and a truss-rod engaging at its opposite endsin said cross-heads and passing beneath said knife-bars upon the convexside of said frame, substantially as described.

2. In a crushing and pulxerizing machine, a stationary cage or framearranged to be operated against by the heaters, said frame comprising apair of curved members provided upon their inner opposite faces withlongi tudinal grooves, and crossheads rigidly conmeeting theircorresponding ends; a plurality of sectional knife-bars engaging attheir ends in said slots; said knife-bars having central transversegrooves in their base edges in alinement; and a truss-rod engaging atits opposite ends in said cross-heads and passing beneath saidknife-bars upon the convex side of said frame engaging in said grooves,substantially as described.

In testimony whereof we affix our signatures in presence of twoWitnesses.

THAXTER SHAW. JOHN 0. LEE.

Witnesses:

JOHN B. I'IAGARTY, O. A. ANDRESEN.

